Lettuce; shredded Tomatoes; chopped Crush taco chips and place in lightly-oiled 9x13-inch pan. Brown hamburger and onion; drain. Add tomato soup and taco seasoning. Mix and pour over chips. Spread cottage cheese over meat mixture. Add cheddar cheese. Cover with foil. Bake 40 minutes at 350-degrees. Serve with shredded lettuce and chopped tomatoes.